We have definitely set our company a part from others in the way we do business.  Here are just a few points:

1-Lifetime Warranty on installation
2-10-Year Parts and Labor Warranties on TRANE products
3-Financing
4-Rebates
5-Maintenance Agreements
6-Clean, friendly, neat employees
7-Sell only quality products
8-Complete explanation of system operation
9-Return call and/or visit after install
10-Drug-free
11-Full line service
12-Protective shoe covers used
13-Inspect duct system
14-Heat loss-heat gain (manual J) on each job
15-Evacuation of system for impurities
16-On-going training
17-Air balancing
18-Start-up and test